As your first art submission, it's a pity that this did not get actually passed. I'm amazed it has stayed this way for so long! Anyway, I guess I'm used to more clever stuff by you, because I didn't find this that funny or entertaining. I suppose the image itself isn't drawn too poorly. It just doesn't seem to make much sense to me. The funniest thing about it is probably the yellow suits the criminals are wearing.
Even the green masks are kind of yellow-y. Well, people should be aware that there are people who urinate on random people. Of course, they mostly tend to be homeless. I just would like some more detailed stuff and more of a joke. The wall is pretty nicely detailed with the cracks, though.